It has been more than a decade since Target launched its first designer collaboration, sparking a seemingly endless number of imitators. The pairings lure customers with the promise of designer looks at mass market prices, while the designers and retailers leverage the power of two brand names into often lucrative business endeavors. And although a few of last year's efforts fell a bit flat -- Neiman Marcus and Target's highly touted holiday collection went on mark-down after only three weeks, for instance -- pairings are still going strong. Here are some of the most alluring style collaborations planned in the first half of this year.